MarcoB
Absorbed member
- Feb 2, 2023
- 66
- 73
Starting a thread on this specific value to seek more information on this.
Particular on improving this number.
What I found so far, without disregarding the fact it is part of a safety feature of the ECU:
-This retarding value for optimum power levels maxes out around 25.
-There seem to be 2 KCLV’s operating regions: low RPM and high RPM (below and above 4000RPM, about the same as the changeover from port to direct injection).
-The low KCLV changes faster than the high KCLV value.
A company in Japan called Vehicle Field
apparently developed a special method that brought both regions to 24.1 in approximately five minutes.
Now that would be very interesting to know!
Since slow driving alters this value too, it seems it does not stick.
However the low-rpm KCLV recovers quickly.
A quick glance in Techstream showed mine at 21.9
I took this reading from a standstill and idling, so this value says nothing about the high RPM KCLV.
ChatGPT found some more info on this matter from that same company.
They describe a modification intended to:
-Make the learned value less likely to fall.
-Make it easier to recover after falling.
-Maintain higher learning values during summer.
But the detailed procedure is behind a paid article. So Chat is not able to come up with more details.
But it would certainly be interesting to know how we could maintain this higher value.
(Besides the obvious as to fill up consistent premium fuel.)
Particular on improving this number.
What I found so far, without disregarding the fact it is part of a safety feature of the ECU:
-This retarding value for optimum power levels maxes out around 25.
-There seem to be 2 KCLV’s operating regions: low RPM and high RPM (below and above 4000RPM, about the same as the changeover from port to direct injection).
-The low KCLV changes faster than the high KCLV value.
A company in Japan called Vehicle Field
apparently developed a special method that brought both regions to 24.1 in approximately five minutes.
Now that would be very interesting to know!
Since slow driving alters this value too, it seems it does not stick.
However the low-rpm KCLV recovers quickly.
A quick glance in Techstream showed mine at 21.9
I took this reading from a standstill and idling, so this value says nothing about the high RPM KCLV.
ChatGPT found some more info on this matter from that same company.
They describe a modification intended to:
-Make the learned value less likely to fall.
-Make it easier to recover after falling.
-Maintain higher learning values during summer.
But the detailed procedure is behind a paid article. So Chat is not able to come up with more details.
But it would certainly be interesting to know how we could maintain this higher value.
(Besides the obvious as to fill up consistent premium fuel.)
